Separator including multi-flow drain

A separator including a multi-flow drain, the separator comprising:

• a housing comprising an intermediate member having a cylinder-shaped hollow, and an upper member and a lower member formed at both ends in a length direction of the intermediate member, the upper member having an inlet and an outlet, the lower member having a drain;
• an outer barrel disposed coaxially with the housing inside the housing, and having a smaller diameter than an intermediate member;
• an inner barrel disposed coaxially with the outer barrel inside the outer barrel, and having a smaller diameter than the outer barrel;
• a plunger configured to move up and down inside the inner barrel;
• a floater configured to be movable up and down in a predetermined range by the plunger, while being hollow to have buoyancy;
• a discharge valve having a guide protrusion, a diameter-reduced portion, a grooved portion and an adhering portion, the guide protrusion protruding upward to penetrate a center of the floater, the guide protrusion disposed coaxially on a central axis of the intermediate member, the guide protrusion protruding along a longitudinal direction to function to guide the floater to linearly move up and down along a longitudinal axis, the diameter-reduced portion having a reduced diameter and formed on an inner circumferential surface of the discharge valve, the grooved portion and the adhering portion extending downward of a piston;
• a pressure hole formed through a thickness in a side surface of the discharge valve;
• and
• the piston configured to be movable up inside the discharge valve, the piston being moved up by pressure of fluid introduced through the pressure hole;
• a first filter member disposed on an upper outer circumferential surface of the outer barrel;
• a flow hole formed in a lower outer circumferential surface of the outer barrel;
• and
• a second filter member formed to block the flow hole.